Fluid Dynamics Essays

Fluid Dynamics Essays Fluid Dynamics Essay Fluid Dynamics Essay As objects move through fluids, they are exposed to numerous forces that enhance or impede their progress. By analyzing and understanding these forces, one can predict the velocity of a moving object. Of the forces exerted on an object falling through a liquid, such as buoyant force or the force of gravity, the viscous or drag force appears to have the largest negative effect on the object. The effect of aero and hydrodynamic drag forces and friction appears underrepresented in high school physics courses. Perhaps it is because concepts such as viscous and turbulent drag forces are difficult to predict and measure. My preliminary research indicated there are many factors affecting the forces on an object. These concepts fall in the field of fluid mechanics. Initially, my study began with the idea of measuring the aerodynamic drag force exerted on a model rocket. My primary interest was in the factors that influenced the maximum height reached by a rocket with a set amount of propellant. I thought that launching a rocket on a particularly humid or hot day might result in a different maximum height than a launch on a colder day. It might be possible to theoretically identify the factors such as the pressure or density of the air, then relate them to the measured height. I soon realized that this experiment would not produce accurate data or a clear theoretical relationship because it involved a multitude of variables that were impossible to control without the use of a weather-controlling machine. : Progressing fromthis first idea, a more controllable experiment evolved: measuring and comparing the terminal velocities of a ball falling through glycerine at various temperatures. Glycerine was selected because its high viscosity1 exhibits demonstrable results. The amount of viscous drag within a given fluid appears to vary within a controlled container by temperature. This experiment was designed and conducted to test the following question: How is the terminal velocity of a ball falling through a column of glycerine affected by a change in the temperature of glycerine? This study analysed the terminal velocities of an object falling under the force of gravity through a fluid at varying temperatures. My hypothesis states that as the temperature of the fluid decreases, the terminal velocity of the object will decrease by a proportion of. I base this prediction on the electrostatic bonding properties displayed in liquids. In order to prove this, an experiment will be conducted using a small metal ball and glycerine. The third force exerted on the ball, drag, is always in the opposite direction of the movement. It is very similar to the friction force on a block sliding down a plane, which works in the opposite direction of the motion. The source of drag is derived from the viscosity of the fluid and the incidence of turbulence4 on the ball. At lower velocities, turbulence is small and laminar, whereas at higher velocities, turbulence becomes drastic and has an enormous effect on the drag force. One can use the Reynolds number, Re, a dimensionless value, to determine the nature of the flow (equation 4).

I must write a after action review (AAR) based off my deployment to Essay

I must write a after action review (AAR) based off my deployment to Afghanistan - Essay Example It therefore exposed me to various aspects of combat missions and on strategic management of operations while on such deployment missions. Among the main areas that the deployment gave me an exposure in are together with the concept of acquisition, concept of command and control, MTOE (modified table of organization and equipment) as well as on power efforts within Afghanistan. Besides, I learned a lot on the responsibilities and the main competences that an acquisition officer within such missions is expected to have in order to realize effectiveness in the entire operations. First, I must admit that the tour served a great learning experience especially in practice of what military science class had taught me. For instance, unlike what theory supposes, that current field operations influence much the concept of acquisition, the tour taught me that the concept of acquisition is and should be centered on the old (tradition) garrison operations. Concerning the command controls, it is worth noting that as much as a command coronel has the power to command the teams he/she leads, other vested interests in pleasing the project managers and the superiors end up confusing and hence effectiveness is compromised on such missions. This could not be well phrased while in the class context but when one is given such a responsibility in the field as I had, I managed to have the practical aspect in the command and control within military science. Moreover, the field experience showed me that the MTOE does not necessarily support the war that the fighters need. It was also through this trip that I understood that redundant operational energy power efforts within Afghanistan could be blamed on the multiple power providing organizations that were in operation within the country. Among most other things learnt from the places visited and over the tasks assigned were on strategic planning, roles assignment and responding to emergencies whenever need arises. When I went out for

Power and Politics Essay Example | Topics and Well Written Essays - 750 words

Power and Politics - Essay Example Since political legitimacy is define as the extent to which citizens regard the state, its institutions, personnel, or policies are morally or acceptable. On their situation it is difficult and somewhat impossible, to acquire legitimacy as to their response since there is no economic growth , no major political parties to lend stability and continuity for their public policy and also there is no dominant leader since Lucien have resigned and gone away leaving them no authority's to enjoy. An opportunity doesn't come always. People's tendency when given an opportunity is to grab it immediately. But in Michaels situation, there is a big confusion, but remember that Michael have the patience , for he waits for this opportunity for about 2 years though not that long, so this is the chance for him. Since he has a stellar brand results and strong track record that might help him gain the position though there is competition between Danielle Harcourt and him. But let him face it. The will to fight for the position is great emblems of braveness that leaders should possess. He must consider his fellows and help his company gain legitimacy under him. What he needs to do must be for the common good. Not only for his personal progressions but same with his people. Michael should take the China opportunity but let us consider the practicality regarding its job location. If he is an origin of New York and lives there with its culture, it's better for him to stay. If he do really w ants to go too to China as his aspiration, he may go and be a settler for time. Michael enters and performs the Elitism power. He will manned a top hierarchy or elite; for he is one of the powerful individuals of high status which enhanced by prestige or salient position within the hierarchy of the power structure constituting him as an elite. 1) He must provide political stability which makes possible of the continuity of public expectation and government performance essential to the political process. 2) He must impose democracy making possible of the meaningful and wide spreads participation of citizens in the definition of public policy. Cultures matters most surviving of Michael in china is basely difficult. Since he is not aware of china's culture and tradition regarding business of people there. Michael must provide the following: (outline) 1) Goal a) improving the business production b) transaction (deals and orders) c) increase sales 2) Controlling the people a) assign task b) improved leadership with them 3) Hire a) high qualitative persons b) Flexible and hardworking individuals 4) Implement a democratic socialism government a) Authoritarian b) Presidential form Bibliography Rodee C. et al. (1983) Introduction to political Science. USA: Mc

The Composer Benjamin Britten Essay Example for Free

The Composer Benjamin Britten Essay On November 22, 1913, the feast day of Saint Cecilia, the patron saint of Music, was born a child who showed a great interest and talent in music. Benjamin Britten was born in Lowestoft in Suffolk. Though his father was a dentist, he had great interest in music, and his mother also was an amateur singer, and so it could be said that Britten inherited his interest in music from his parents. Even as a child, he could compose creatively. Benjamin Britten was educated at Gresham’s School. In 1927, Britten started his private training with Frank Bridge, an eminent English composer. He also studied under John Ireland at the Royal College of Music and under Ralph Vaughan Williams. After his graduation, Britten was very clear about his future. He was determined to be a composer and composed music for a number of plays. His first notable compositions were the Sinfonietta and A Boy was Born, and from there his fame grew, and he was Benjamin Britten 2 popular. In 1936, Benjamin met tenor Peter Pears, which set off a great relationship. Peter Pears was his inspiration, and they eventually became partners. Peter Pears had a great influence on his life and his music, and to him, Britten had composed a number of songs. Peter had a great influence on Britten, both in his personal life as well as his professional life. He was among the greatest English composers of the 20th century. Though some critics found Benjamin’s social and sexual relationships not appropriate of a young English musician, his perfect technique and his knack of treating the traditional musical forms with originality and freshness compensated the charges. He was excused from army service and was allowed to practice his composition work provided he performed as a pianist at concerts at wartime sponsored by the Council for the Encouragement of Music and the Arts. Over the years, he had also started writing for operas. As an opera composer, Benjamin Britten gained worldwide reputation. It is indeed interesting to note that he was the first musician to be honored with the title of â€Å"Lord† by the Queen. He also was approached for writing for special occasions. Benjamin went to America for some time but later returned to England. In 1945, with his opera Peter Grimes, Benjamin became a celebrity. It was a great success. His successive operas like the Church Parables were also greatly appreciated. Benjamin’s best known orchestral music, popularly known as The Young Person’s Guide to the Orchestra, a tribute to the great composer Henry Purcell, is very informative. His Reflections on a Theme of Dowland is also a tribute, this time to the lutenist John Dowland, which is indeed a moving Benjamin Britten 3 performance. Benjamin Britten was an outstanding English composer popular throughout the world. In 1948, he successfully planned the first Aldeburgh Music Festival which later became an annual event. Benjamin also excelled in chamber music, his notable ones being Cello Sonata and three Cello Suites. Benjamin often worked with the renowned poet W. H. Auden who offered the texts for which Britten provided music. Britten was awarded the Order of Merit in March 1965. This was his most treasured honor. Since its inception in 1902, only two people had got it prior to Britten. He also won the Robert O. Anderson Aspen Award in the Humanities. He was the first musician to be honored with the title of Baron. During the latter years of his life, Benjamin often complained of ill health. In May 1973, he had an open heart surgery which made him an invalid for life. He still attended the London premiere of Death in Venice in October 1973. He then traveled to Germany and Italy. According to Pears, Britten was not scared of death. On December 4, 1976, in his hometown in Suffolk, he died of a heart attack. He is buried in the resting place of the Aldeburgh Parish Church with his colleague Peter Pears resting in peace adjacent to his grave. Benjamin Britten 4 Works Cited 2007 Naxos Digital Services, Britten Benjamin, biography [Electronic Version] Retrieved on June 6, 2007, from www. naxos. com

Analyzing the Marketing of Rehabilitation Goods & Services and The Dis

The Marketing of Rehabilitative Goods and Services by Gary L. Albrecht was written with the intention of giving its reader a better understanding of who has the most to gain in the business of rehabilitative services. One position states that the institutions benefit most, while others feel it is the consumer who has the most to gain. The main controversy discussed in this article is the usage of marketing strategies for rehabilitative health care institutions to increase sales and raise profit margins on service that was once provided pro bono. Another concern is with the amount of new equipment and ever changing standards of rehabilitation. Are consumers well enough informed or educated into making the proper decisions as to what care they need? Also, how do the poor, elderly, disenfranchised, and those who cannot afford healthcare receive treatment? Are patients receiving the best possible care for their ailments; or are they being exploited? These are the dilemmas on the issue o f rehabilitative goods and services. The Disability Wars by Timothy Kenney describes the nightmare of becoming physically disabled to the point where one can no longer work and care for their family. It also talks about the hardships of and problems brought about through the use of medical benefits and collection of social security. Both articles will now be analyzed more closely and possible resolutions to each of these issues, marketing of rehabilitation goods and services, and the disability wars will be discussed.   Ã‚  Ã‚  Ã‚  Ã‚  The main issue with the marketing of rehabilitative goods and services deals with, the new wave of marketing strategies and promotional ideas implemented to increase sales and profits of the health care institutions. This rehabilitative service, which was once provided to those in need pro bono, is now recognized as a commodity. Due to the increase in the elderly population and the popularity of sport, there are more people with disabilities than ever before. Thus an influx in the supply and demand has been created and the market for rehabilitative services exists. With more patients than the normal health care provider can care for, new institutions are being erected all across America with their sole purpose in rehabilitating the disabled. One such facility is the Rush-Presbyterian St. Luke’s Medical Center in Chicago. This medical ce... ...y.   Ã‚  Ã‚  Ã‚  Ã‚  The moral and ethical questions that are raised in this article have to deal with insurance companies and social security alike having the ability to deny claims as they please, leaving people with serious medical conditions out there with no support when they need it the most. Another big controversy with social security is the fact that people pay into it for so many years and when it comes time for social security to pay back, they just deny the claim and send you back to work. But once the ill person returns to work the social security payments are immediately deducted from their checks again. A possible solution for this problem is to have the CDC and FDA get together and make a list of acceptable diseases and syndromes that will be covered by social security and then provide assistance to everyone who falls into the acceptable categories. It is understandable that the insurance companies are in business to make money, however the Social Security Administrati on should not. They should be required to pay back out to those who have paid in. Some legislation should also be passed as to how insurance companies can disseminate amongst valid claims.

Honour Is Shakespeare’s “Much Ado About Nothing”

When we look closely at the romance of Beatrice and Benedick, we see the problems that a rational lover has in putting aside his concept of honour in order to love a woman and Shakespeare cleverly contrasts this relationship with our idealistic lover Claudio, who is incapable of rejecting the restrictions that honour places on a man. In a parallel construction we see through the relationship that the boorish Claudio has with the docile Hero that for love to flourish it must reject chivalric notions of honour. The social hierarchy of Messina, is a very class conscious one and being witty is almost a full time occupation for many of its inhabitants. Playing practical jokes and tricks upon each other is a subtle way of maintaining the strict codes of conduct and among the most successful and benevolent of the deceptions practised are the parallel practical jokes played on Beatrice and Benedick in order to trick each of them into admitting their love for one another. In their first encounter, we see Beatrice and Benedick using their superior intellects to ridicule each other. Benedick warns her to ‘keep her ladyship’ and she lashes back with insults around his physicality suggesting that he is so ugly that ‘scratching his face could not make it worse’. Benedick uses his wit to shield himself from her barbs, hiding his true feelings and pretending to enjoy his bachelor existence when actually it is a mechanism for his safety. Benedick presents one face to the world in order to be accepted by the society that judges him and it is this society that acknowledges his wit, but underpinning Benedick’s wit is his distaste for the superficial values that Messinian society is built upon. His ironic attitude towards both himself and the world he is held captive by is apparent in his soliloquy, where he weighs up the discrepancy between how the world sees him and how he sees himself. The repartee between Beatrice and Benedick is sometimes blunt and crude, sometimes elaborate and self conscious. Puns, similes, metaphors, and paradoxes are all brought into play in their continual game of mutual insults and it is this aggressive verbal battle which pushes Beatrice and Benedick to the foreground of the play. Being in love is a game for fools and Benedick vows to never be ‘such a fool’. Benedick persuades himself that by staying away from Beatrice and denying himself any notions of marriage, he is a confirmed misogymist, that he is the stronger individual and has control over his life instead of living for another human being and risking becoming a hopelessly ‘in love’ lover. Benedick views women in society as somehow predatory, wanting to ‘capture’ a man and contain him in marriage, only to torture him with subsequent betrayal. However when faced with a woman such as Beatrice, who proclaims herself equally contemptuous of marria ge and for the same reasons, Benedick’s role begins to fall apart, which is where Benedick faces the biggest battle in his life, as he fights to hold on to his notions of male honour. But no matter how hard he tries he cannot frame for himself a separate language of love and as a result he and Beatrice construct a loving relationship which is as much of a sparring match as their enmity, once Benedick gives up his notions of male honour. In stark contrast to Benedick and Beatrice, Shakespeare’s ideal lovers, Claudio and Hero, ‘believe’ they are in love with each other, but we quickly see that when put to the test this love is superficial and lacks the true acknowledgement of each other’s individuality needed to sustain it. Their love for each other, although seemingly sincere, dissipates at the first obstacle and doubt sees one quick to accuse the other of adultery. For Beatrice and Benedick however, their jokes are the means whereby they can resist the kind of love-relationship exemplified by Hero and Claudio. In the end the ‘happy-ending’ which sees Hero married off to Claudio is one fraught with contradictions, for this conventional relationship, founded as it is on romantic love, which they exemplify, has been severely satirised by Shakespeare. By presenting the relationship between Beatrice and Benedick as real and not idealistic, we see the fragility of an idealised, romantic love such as the one Claudio has with Hero and its tendency to collapse into loathing and disgust becomes all too apparent. Appropriately the play ends not with Claudio and Hero whose strict adherence to an unbending code of honour temporarily fragments their relationship, but with Beatrice and Benedick who overcome both the male code of honour and society’s expectations to love and accept each other for their individual selves. There is a relationship built on mutual trust, respect and acceptance and proof that Love must be truthful to be sustained.

Testing Diffusion Of Molecules Across The Cell Membrane Essay

The purpose of this experiment was to test diffusion of molecules across the cell membrane to see which factor of time, concentration, and mass took effect of increase or decrease of diffusion over time. For the concentration experiment three different concentrations were made of the KMnO4. Three test tubes were filled with 4 ml of water. The first test tube had 1 ml of the 500 KmnO4 added to it. Then the second test tube had 1 ml from test tube one and 4 mL of water. For test tube 3, 1ml was taken from test tube two. Each concentration was placed into a dialysis tubing using the strings to tie off one end and the clamp to close off the other end. Before the dialysis tubing was placed in the beaker, 1ml of a sample was placed in a cuvette to blank the spectrophometer. Each stir plate was set on a low speed and the dialysis was hung in the water by a string. Every 5 minutes that passed a sample of 1 ml was taken and put into a cuvette. The cuvettes were placed in the spectrophometer t o measure the absorbance of each solution. The measuremnts were then recorded in lab notebook. Once the measurements were documented, the average of absorbance and concentration was recorded. For the temperature experiment, three hot/stir plates with a beacker set on top were set to 25 degrees Celsius, 37 degrees Celsius, and 50 degrees Celsius. Three dialysis tubing were filled with 2 ml of the 0.1 M KMno4 and were closed with a string on one end and a clamp on the other end. Before they wereShow MoreRelatedEssay about writing assignment 2980 Words   |  4 PagesPolarity In Diffusion Of Molecules Across Cellular Membrane Abstract: Cell membranes play an important role in regulating what goes in and out of the cell. Diffusion, the process of movement of substances across the cell membrane from higher concentrations to areas of lower concentration, plays an active role in the transport and the regulation through cellular membrane. 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